UserDefinedFunction2 (lenses-sql-udf 5.0.1 API)

All Superinterfaces:

UserDefinedFunction
```
public interface UserDefinedFunction2
extends UserDefinedFunction
```
Interface for User Defined Functions taking two arguments.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Value`	`evaluate(Value arg1, Value arg2)`	Evaluates this UDF for the given arguments.
`DataType`	`typeMapping(DataType arg1Type, DataType arg2Type)`	Defines a mapping from input to output types.

Methods inherited from interface io.lenses.sql.udf.UserDefinedFunction
name, owner, version

- Method Detail
  - typeMapping
```
DataType typeMapping(DataType arg1Type,
                     DataType arg2Type)
              throws UdfException
```
    Defines a mapping from input to output types.
    
    Parameters:
    
    arg1Type - The data type of the first argument.
    
    arg2Type - The data type of the second argument.
    
    Returns:
    
    The resulting data type.
    
    Throws:
    
    UdfException - if one or more of the given data types are not supported by this UDF.
  - evaluate
```
Value evaluate(Value arg1,
               Value arg2)
        throws UdfException
```
    Evaluates this UDF for the given arguments.
    
    Parameters:
    
    arg1 - The first argument.
    
    arg2 - The second argument.
    
    Returns:
    
    The result of the evaluation.
    
    Throws:
    
    UdfException - if the evaluation failed for some reason.